Therefore, using Theorem 4.1 in [1]} with step-size \(\eta \le \frac{1}{2L}\) , we have
\({ \hat{F}(\hat{}) - \hat{F}(^*)} \le O{ 2\eta ^2 + \frac{D^2}{\eta T}} = O{2\eta {\frac{2G^2}{m} +\sigma ^2d} + \frac{D^2}{\eta T}}\) 
